Based on the provided financial data and S&P methodology for IBERDROLA SA, we can assess its suitability for hybrid bond issuance:

1. **Business Profile & Cash Flow Visibility:** Iberdrola is a major international electric utility. According to the S&P Regulated Utilities methodology, such entities operate with high regulatory advantage, transparent tariff-setting, and highly visible cash flows. They provide essential infrastructure with few substitutes. This aligns perfectly with the "Strongly Suitable" criterion of being a regulated utility or infrastructure-like business with highly visible cash flows.

2. **Financial Metrics & Credit Profile:** Looking at the 2022 balance sheet, Total Equity is €58.1 billion, while Noncurrent and Current Financial Liabilities total €69.3 billion. The FFO/Cash Flow from Operations for 2022 was €10.44 billion. The FFO-to-debt ratio stands at approximately 15% (10.44 / 69.3), and the Debt-to-Equity ratio is roughly 1.2x. Under S&P's medial volatility table for regulated utilities, these metrics point to an investment-grade profile in the BBB area (specifically, an FFO/Debt of 15% typically corresponds to a 'BBB' minimal indicator under the medial volatility assessment). Thus, the profile is not 'A' category (which would make hybrids unnecessary/Not Suitable) nor sub-investment-grade, but squarely in the BBB space where hybrids can provide meaningful rating headroom.

3. **Existing Hybrids & Refinancing Rationale:** The cash flow statement and equity statement reveal that Iberdrola already has perpetual subordinated obligations outstanding. There is an accrual for interest on these obligations ("Devengo De Intereses De Obligaciones Perpetuas Subordinadas") of €169 million in 2022, and a prior issuance of €2.74 billion in 2021. Having existing hybrids strengthens the case for issuance, as it demonstrates market acceptance and institutional investor appetite for their subordinated capital. Furthermore, if any of these existing instruments are approaching their first call date (step-up dates usually 5-10 years after issuance), there is a strong refinancing rationale. 

4. **Capex & Funding Needs:** Iberdrola shows a high level of capital investment, with "Purchase Of Property Plant And Equipment" at €6.27 billion and "Construction In Progress" increasing from €9.06 billion to €11.5 billion in 2022. This massive capex program for renewable energy and network expansion creates a strong rationale for hybrid issuance to fund growth while preserving the leverage profile.

5. **Equity-like Characteristics:** For a solid BBB utility like Iberdrola, a hybrid bond is deeply subordinated but viewed by rating agencies as 50% equity credit, materially improving adjusted leverage metrics and preserving the current rating against the backdrop of heavy capex. The risk of coupon deferral is extremely low for an investment-grade utility, avoiding the "expensive subordinated debt" stigma typical of weaker issuers.

Conclusion: Iberdrola is a regulated utility with a BBB-like financial profile, heavy capex funding needs, and existing hybrid programs. Issuing hybrids provides a strong rationale for refinancing, funding growth, and preserving rating headroom.

<answer>Strongly Suitable</answer>